Eliminating Leakage In The Pump Module - Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual

7.2 Eliminating Leakage in the Pump Module

The leak sensor is installed inside the pump module. The sensor reports a leak when liquid
collects in the drip tray under the fluid connections. Locate the source for the leak,
eliminate the cause, and dry the leak sensor.
1. Wait until the pressure is down to zero.
2. Inspect the fluid connections in the pump for signs of leakage. Tighten or replace
leaking connections if necessary.
3. With a cloth or tissue, absorb all liquid that has collected in the tray. Be careful; do not
bend or damage the sensor.
Leak sensor
4. Allow the sensor to adjust to the ambient temperature for a few minutes. The red
sensor LED should now be dark. (The yellow LED may be dark or illuminated; this
LED does not indicate errors.)
5. If no errors are reported, you can resume operation.
6. Loading pump only
Test the loading pump for leakage after you have carried out maintenance or repair work
on the fluid connections (→ page 211).
NC pump only
Visually check the NC pump for leakage while pressure builds up. If leakage occurs for
the NC pump, the message 'Cannot regulate flow' will appear on the pump display
(→ page 149).
Tip: If the sensor is not dry, the Status LED for the pump module remains red. If a
message appeared on the front panel display, select Clear on the navigation bar
to remove the message from the display.
Operating Instructions
Fig. 60: Drying the leak sensor
UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Sensors
Page 177